Flow tripped injector

Abstract

A turbulent flow injector includes a ceramic injector body having an outerylindrical wall with an inner surface, an inner cylindrical wall having an inner surface, an end wall at an outlet end of the body terminating the outer and inner walls so as to define an annular cavity between the inner and outer walls. The annular cavity is open at an inlet end of the body. A duct, defined by the inner surface of the inner wall, has an inlet at the inlet end of the body. A heat conductive insert is positioned within the annular cavity and has an outer surface in thermal contact with the inner surface of the outer wall. The insert has an external section extending beyond the inlet end of the body and cooling fins extending from the external section. An annular air chamber is defined between the insert and the inner wall of the body. An important feature of the invention is a protuberance mounted at the inlet end of the body and radially extending over the inlet of the duct for inducing turbulent flow in a fluid flowing through the duct.

I claim: 
     
       1. A turbulent flow injector, comprising: a ceramic injector body having an outer cylindrical wall with an inner surface, an inner cylindrical wall having an inner surface, an end wall at an outlet end of said body terminating said outer and inner walls so as to define an annular cavity between said inner and outer walls, said annular cavity being open at an inlet end of said body, a duct defined by said inner surface of said inner wall and having an inlet at said inlet end of said body;   a heat conductive insert positioned within said annular cavity and having an outer surface in thermal contact with said inner surface of said outer wall, said insert having an external section extending beyond said inlet end of said body and having cooling fins extending from said external section;   an annular air chamber defined between said insert and said inner wall of said body; and   a protuberance mounted at said inlet end of said body and radially extending over said inlet of said duct.   
     
     
       2. The injector of claim 1 wherein: said body is chemically resistant to lithium and SF6, each at a temperature in the range of 1800°-2000° F., and has a melting temperature in excess of 2500° F.   
     
     
       3. The injector of claim 2 wherein: said body is manufactured from a ceramic material.   
     
     
       4. The injector of claim 3 wherein: said ceramic is made of a material selected from the group consisting of silicon nitride and a composite zirconium based ceramic.   
     
     
       5. The injector of claim 4 wherein: said heat conductive material is selected from the group consisting of copper, gold/gold alloy, and silver/silver alloy   
     
     
       6. The injector of claim 5 wherein: said protuberance is composed of a material selected from the group consisting of nickel, titanium, tungsten, and stainless steel.   
     
     
       7. The injector of claim 6 wherein: said heat sink insert has cooling fins for transferring heat away from said insert.   
     
     
       8. The injector of claim 7 wherein: said protuberance is stainless steel wire.   
     
     
       9. A turbulent flow injector, comprising: a ceramic injector body having an outer cylindrical wall with an inner surface, an inner cylindrical wall having an inner surface, an end wall at an outlet end of said body terminating said outer and inner walls so as to define an annular cavity between said inner and outer walls, said annular cavity being open at an inlet end of said body, a duct defined by said inner surface of said inner wall and having an inlet at said inlet end of said body;   a heat conductive insert positioned within said annular cavity and having an outer surface in thermal contact with said inner surface of said outer wall, said insert having an external section extending beyond said inlet end of said body and having cooling fins extending from said external section;   an annular air chamber defined between said insert and said inner wall of said body; and   a protuberance mounted at said inlet end of said body and radially extending over said inlet of said duct for inducing turbulent flow in a fluid flowing through said duct.   
     
     
       10. The injector of claim 9 wherein: said body is chemically resistant to lithium and SF6, each at a temperature in the range of 1800°-2000° F., and has a melting temperature in excess of 2500° F.   
     
     
       11. The injector of claim 10 wherein: said body is manufactured from a ceramic material.   
     
     
       12. The injector of claim 11 wherein: said ceramic is made of a material selected from the group consisting of silicon nitride and a composite zirconium based ceramic.   
     
     
       13. The injector of claim 12 wherein: said heat conductive material is selected from the group consisting of copper, gold/gold alloy, and silver/silver alloy.   
     
     
       14. The injector of claim 13 wherein: said protuberance is composed of a material selected from the group consisting of nickel, titanium, tungsten, and stainless steel.   
     
     
       15. The injector of claim 14 wherein: said heat sink insert has cooling fins for transferring heat away from said insert.   
     
     
       16. The injector of claim 15 wherein: said protuberance is stainless steel wire.